This crossword No. 25640 clues and answers were published on Sat 19 May 2012 and the puzzle can be visited by following The Guardian Prize Crossword No. 25640 link.
All Across Clues and Answers:
1-across – OK character on page with mistakes about the boy Silver : PERSONA
5-across – Demonstrate against 3 about right : BARRACK
9-across – Brown ink : SEPIA
10-across – Black stuff put on boy in sheet : TARPAULIN
11-across – One supplying drinks without food for the seventh stone : BEGGARMAN
12-across – Twig how to spell film actress 16’s name? : WITHY
13-across – See 1 : GRATA
15-across – Insane medico having quarrel with piece of officer’s kit : SAMBROWNE
18-across – A period in the wagon accessed by stopcock : WATERMAIN
19-across – Exclusive ice cream? : SCOOP
21-across – Summing up number in harvest : RECAP
23-across – Trouble about meat with a crack : RIFLESHOT
25-across – Form of carbon in iron and gold, gun giving it energy : AUSTENITE
26-across – Common Praise in Latin? Turn back : USUAL
27-across – Little bird will listen before speaking : HEARSAY
28-across – Immerse time and time flies : DIPTERA
All Down Clues and Answers:
1-down – Group of letters after uplifting talk : POSTBAG
2-down – Payment embracing dog not applicable — it’s offensive : REPUGNANT
3-down – Zero degrees in the hot seat? : OBAMA
4-down – Herb — goddess gets one first : ARTEMISIA
5-down – Poet in a good year : BYRON
6-down – Endless worry with Skoda makes for restriction on travel : ROADWORKS
7-down – Parcel out from Genesis to Malachi? : ALLOT
8-down – Family flat, maybe, on Mull? : KINTYRE
14-down – First class, sorely pressed, must be measured in knots : AIRSPEEDS
16-down – Park Emma : MANSFIELD
17-down – See 16 : WOODHOUSE
18-down – Pervert with funny hat on the way to cause grief : WARPATH
20-down – Cap given with approval to Fitzgerald : PATELLA
22-down – Conspirator taking notes from waterfall : CASCA
23-down – Call on reserves on such a day and get home in the light : RAINY
24-down – Provide with English joke : EQUIP
This crossword has in total 32 where 16 are across and 16 are down.